Well. Well. Well.
Yep it is true . . . most IC engines of the last 30 years do use a lot of electronics. So . . . What?
IF those electronics are NAMED branded manufactures; who can be sued; bad reputaion shunned and then not-sold out of business . . . . and unless they design for world-wide, ALL users, ALL climates reliabilty then it is just Hobbiest $'s holes in your pockets.
I Like electronics. Ha! Ha! Would not be talking to you’all now without them.
I just like my dependnet-use electronics to have been made in lots of at least 100,000; with 10 years of broad field proof-used experences. My Stilh electronic ignition chain saws. My Honda power electronic ignition equipment. My Kohler Power equipment. My two sets of Crimson Trace laser grips.
Look at all of these and you will see that the design engineer’s optimized the mechanical portion FIRST; then used the electronics to active, final finite tune. And THIS fine tuning is really just the frosting on the cake.
First you must have a good mechanical basis to put it onto.
In real use Life you will find that this added on complexity of electronics just like 17th Century mens and womans Elite’s clothing was so-much froo-fra excesses. Grandstanding show-off of clothing desiners. All while the real people starved, cold sickened, needing basics. The basic needs of the real people are most often ignored by Artists, Designers, Inventers and even Hobbists.

Mechanical Auto-mixture developing is for covering a basics.
This basic can easily just be ignored on Woodgas personal use stationary. So what if it batch cycles a little rich or a little lean? As long the powershaft goes around and around With power you can make real people useable electricty.
Vehicle mix tuning can be easily done with a trained, knowlwdgable human operator. Dah. Just like light aircraft.
Removing the human hands, attentivenes is now why many modern electronics autopilot passinger liners are landings crashing. Opps.
Now with cars programmed to parrel park, another reason for operators to aalow themselves to be insultivly, dumb-dumb out and “leave it to the tech Priests”, “leave it to the lifestyle Designers”. Such designer arrogance!
Screw that noise, says I.
I choose to be part of Human enriching solutions. Not part of spin-down-the-the-drain “culture designers” tech-cake layers stacking. Untill . . . Opps!. . . one Tech layer crash and burn, too many. Geeks over-complicate to failures. It is in thier nature. And In the steps up to thier crash and burn failures just become shills for the “you must” top-down, money and power consentrator grubbers.

Woodgas for Power can be direct used, and normal human accesible.
I have really tried to show this all along by example.

Stationary- and small boatmotors run excellently with magneto ignition. So does many tractors too… with the “sportsman” handcranking.

Needs to master the mixing ratio at very low flows, which means precision twin flaps for dispensing.

Additionally, a small manifold vacuum bellow, diaphragm or cylinder to do the flap opening overcomming a spiral when reaching a preset vacuum.
Handgas setting only restricts how much the twin flaps are allowed to open!

This way the precondition of gas flow by gasifier overpressure or ventilating does not affect the desired mixing ratio by the twin flaps!

Here’s a few important sounding questions from a newbie with no experience: doesn’t the woodgas from the reactor vary in “strength/quality” as well as “amount/quantity”? I.e. Weak gas after coasting down a long hill would have a different fuel/energy density, even if it has the same vacuum/water-column and cubic-volume-per-minute flow rate of gas, as richer gas from a gasifier running at peak temperatures/flows? Wouldn’t that inherent difference in fuel/energy density of the gas, which is not directly tied to gasifier vacuum/flow, cause discrepancies in the fuel/air ratio, needing adjustment?

Would a pressure-differential mixer such as this be able to account for that needed adjustment?

Yes, this question has been debated over 100 years!
in every woodgas book!
No one is comming downhill from the Himalayas, anyway… so if the motor goes well with its gasifier system on idle for 15 minutes and more, there is just a little “noch” moment in the retaking of driving power, when the land is flattening out, or a new uphill is about to be “taken”.

With a manual gearbox you can use the motor for pumping more gas than the idle gas need, by swiching off the ignition and giving a little foot (pedal) gas. That is called motorbraking…

Perhaps too modern vehicles also will make a mess with all kinds of shutdown-functions when they are deprived of current?!
Hope you can circumvent that!

If you reed the books, you will learn, that a hearth after heavy drafting can produce an excellent gas, because the steam boiling in the silo pushes out through the hearth, and no air is comming in with nitrogen, which normally will dilute the burnable parts of the gas by ~1:2!

If this goes too far, the motor can be suffocated by the lack of secondary oxygen (air).

This is typical with T-mixing, where the mixing ratio (air/gas) happens above the common throttle.

In this case, the high succing-vacuum is under the common (for both gases) throttle.

Above the common throttle and the succing vacuum you have the two (freely compeating) entrance routes of free flowing gas and air.

This “competition” is under normal power conditions a place with a swift flow-through, and in consequens of that, you have flow resistances in both entrance-routes.
With this flow-through, you can balance the flowresistance between the routes with the traditional hand-regulated air-flap.

That is the traditional way to set the mixing-ratio.

But, when the gasgenerator is pushing out more gas than needed, the mixing ratio is upset, as the t-mixer is dependent on setting the flow resistance equal in both arriving routes (legs).

When the gas is flowing into the T-mixer without succing, it is impossible to balance the “flowresistances” and the air/gas ratio!
…

This will not happen with the twin-flap dispenser, because it is setting and controlling both arriving air and gas routes’ flow resistances independent of which “mood” the gasifier happens to be in!
Pushing or resisting…

The twinflap dispensing is dependent on the always

equal flow areas and equal pressure drops

over both flaps — from cranking to modest high power levels.

At WAT level the twin flaps are no longer the dominant resistant for flow control, so the flow routes for air and gas have to be made absoutely identilcal from the sampling points for the flow routes to the dispensing flaps, and to the swirl mixer.

Sampling points for the membrane, which regulates the arriving air pressure according to the arriving gasflow pressure, when there is a definite pressure drop in the gas line.

Yes, if sensitivity gets you sole! Now a full regulation range within 0.5" WC is good enough for proper and smooth operation. Why then expand the range of service needs with electronic gadgets?
If you start without any electricity available where is the advancement?

By the way, start up does not need any prebalancing for minute intake flows; the twin-flap dispensing makes that with help of the sucking vacuum… INSTANTLY!

The hand idle is completely independent and works like Wayne’s string idle control. It must be completely relaxed for the vacuum bellows to work at cranking. When the engine is running and needs to idle higher, this is adjusted to produce a higher speed. Can be a crude cruise control as well.

HI MAX,has this unit been been tested,or set up being used on truck size motor.and if you could name the componets,i could understand it better,I dont know the simbols, the auto adjust mixer would be nice too acomplish at some point.THANKS

Hi all,
Long time no see. Some of you will know me from the Yahoo groups or have visited my website. Recently it started itching again and I bought a for Dutch standards very difficult to obtain vehicle. A '73 Chevy C-20 pickup truck with a 454 engine. I know, on your side of the pond such vehicles are shredded or left to rot… But me and my wife are happy with with this simple, staight forward truck, although there always will be a Volvo around too.
I am in the midst of building the gasifier. …